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Finding the Fourth Proportional to 158,637.12, 218,919.24 and 87,017.32

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Solution

The fourth proportional to 158,637.12, 218,919.24 and 87,017.32 is: 120,083.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,637.12 : 218,919.24 = 87,017.32 : x
  2. Step 2: Convert to fraction form
    158,637.12/218,919.24 = 87,017.32/x
  3. Step 3: Cross multiply
    158,637.12x = 218,919.24 × 87,017.32
  4. Step 4: Simplify right side
    158,637.12x = 19,049,765,561.24
  5. Step 5: Solve for x
    x = 19,049,765,561.24/158,637.12
  6. Step 6: Final answer
    x = 120,083.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.